Excluding things I know I pay for, such as storage and hardware, how much has Google made from me in the past 10 years? Across search, ad networks, GMail, Chrome, Android, etc. Bonus question: Does Google know?
Not sure if the sources in this article are correct but I just pulled it off from memory.
http://adage.com/article/digital/worth-facebook-google/29304...
Much less than the value you get from it.